Celtic says it has been reinstated in the Europa League after Swiss side FC Sion was thrown out of the competition for fielding ineligible players.

Sion is likely to appeal, prolonging uncertainty before the Europa League group stage kicks off on Sept. 15.

Celtic says on its website that UEFA's disciplinary panel upheld the Glasgow club's protest that Sion selected five players signed in the offseason in breach of a FIFA transfer embargo.

Sion can appeal Friday's ruling to UEFA, then the Court of Arbitration for Sport.

Celtic played both legs of the clubs' playoff last month under protest.

The teams drew 0-0 in Glasgow before Sion won the return 3-1. Pascal Feindouno, one of Sion's disputed signings, scored twice.